Detailed Product Description Scraper(1/8" - 5/8" x 3-1/2") Model: TR 580 Made from high quality tool steel. Great for opening out holes while maintaining concentricity and circularity. 1/8 to 5/8 taper for countersinking screw holes. 3-1/2 blade provides extra-long reaming surface. Works on thin metals,pvc,tubing, wood, plastic.